Key details of the agreement were still unclear late Wednesday afternoon, but a deal not to impose further tariffs while negotiations are underway would avert a trade war between the United States and Europe.

Austrian front-runner Sebastian Kurz, 31, who would become the EU's youngest leader, is expected to attempt to form a coalition with a far-right populist party that was long ostracized for its extreme nationalism.

On Sunday, Spanish police brutally cracked down on Catalans attempting to vote on whether to remain in Spain or form an independent country. Catalans have responded with massive protests against the central government's suppression.